Based on the following reaction profile, how many intermediates are formed in the reaction $A \longrightarrow D$?

Imagine that a local civic group is sponsoring an essay contest about good citizenship. Drawing upon your views and Thoreau's, write an essay exploring ways to serve the community or the nation with your conscience.

Suppose that you are a colonial leader during the American Revolution. Write a letter to convince the ruler of a European nation to support the Americans in the war.

Do you think that either the Hapsburgs or the Ottoman Turks could have built a modern, unified nation from their multinational empires? Explain.

The reaction of cyclopentadiene with benzophenone in the presence of base involves the following steps in the given order: deprotonation, an addition reaction, protonation, an E1cB reaction. What is the product of the reaction?

The voltage $v(t)$ shown in Fig. is given by the graph shown in Fig. . If $i_L(0)=0$, answer the following questions: (a) How much energy is stored in the inductor at $t=3 \mathrm{~s}$ ? (b) How much power is supplied by the source at $t=4 \mathrm{~s}$ ? (c) What is $i(t=6 \mathrm{~s})$ ? (d) How much power is absorbed by the inductor at $t=3 \mathrm{~s}$ ?

As player salaries have increased, the cost of attending baseball games has increased dramatically. The following histogram visualizes the total cost (in $) for two tickets, two beers, two hot dogs, and parking for one vehicle at each of the 30 Major League Baseball parks during a recent season stored in BBCost2016.

What conclusions can you reach concerning the cost of attending a baseball game at different ballparks?

The dc current and voltage sources are applied simultaneously to the circuit . No energy is stored in the circuit at the instant of application.

a) Derive the s-domain expressions for $V_1$ and $V_2$.

b) For t>0$derive the time-domain expressions for$v_1$and$v_2$.

c) Calculate$v_1\left(0^{+}\right)$and$v_2\left(0^{+}\right)$.

d) Compute the steady-state values of$v_1$and$v_2$.

There is no energy stored in the circuit at the time the switch is opened.

a) Derive the integrodifferential equation that governs the behavior of the voltage $v_o$.

b) Show that

$$V_o(s)=\frac{I_{ dc } / C}{s^2+(1 / R C) s+(1 / L C)}$$

c) Show that

$$I_o(s)=\frac{s I_{ dc }}{s^2+(1 / R C) s+(1 / L C)}$$

Large amounts of nitrogen gas are used in the manufacture of ammonia, principally for use in fertilizers. Suppose $120.00 \mathrm{~kg}$ of $\mathrm{N}_2(\mathrm{~g})$ is stored in a $1100.0-\mathrm{L}$ metal cylinder at $280^{\circ} \mathrm{C}$.

By using data in Table 10.3, calculate the pressure of the gas according to the van der Waals equation.

HI and $\mathrm{NaOCH}_3$ react in an acid-base reaction.

$\Delta H^0$ for the reaction is -33.3kcal/mol, which can be determined from the difference in bond dissociation energies (BDE). Is the reaction exothermic or endothermic? Does the value of -33.3kcal/ mol provide any information on the speed of the reaction? Explain.

The energy profile diagram shown represents

(a) an endothermic reaction

(b) an exothermic reaction

(c) a fast reaction

(d) a termolecular reaction

The reaction of 1-bromopropane in methanol occurs by an $\mathrm{S}_{\mathrm{N}} 2$ mechanism. What happens to the rate of this reaction under the following conditions; does it increase, decrease, or is there no change?

I is substituted for Br.

An ester is a compound formed by a condensation reaction between a carboxylic acid and an alcohol. Use the index to find the discussion of esters in Chapter 25, and give an example of a reaction forming an ester. How might this kind of reaction be extended to form a polymer (a polyester)?